Valve with turbulent flow



Nov. 17, 1953 1 H. J. RAND I 3 VALVE WITH TURBULENT FLOW Filed Feb. 12. 1949 INVENTOR. HENRY J. RAND A 7708 NEYJ Patented Nov. 17, 1953 VALVE WITH TURBULENT FLOW Henry J. Rand, Bratenahl, Ohio, assignor to Magic Seal, Inc., Bratenahl, Ohio, a corporation of Ohio Application February 12, 1949, Serial No. 76,073 4 Claims. (01.137-711) This invention relates to improvements in a valve of the type wherein a plug moves downstream into a generally cylindrical bore to close the valve with a feather touch and in a dripproof manner.

One of the objects of the present invention to provide turbulent flow of the fluid at the zone where the plug approaches the bore with a sealing action so as to prevent singing or chattering of the valve. 4

Another object of the present invention is to provide turbulent flow of the fluid by means of roughened surfaces on the plug itself.

Still another feature of the present invention is the provision of turbulent flow by providing roughened surfaces on the valve bore in a novel manner and at a certain zone.

Other objects and advantages of the present invention will be apparent from the accompanying drawings and description and the essential In the drawings, Fig. 1 is a central sectional view through a faucet type of valve embodying my invention;

Fig. 2 is a fragmental sectional view of a portion of Fig. 1 enlarged and showing the valve in closed position;

Fig. 3 is a view similar to Fig. 2 but showing the valve in almost closed position;

Fig. 4 is a view similar to Fig. 2 showing a mod ification wherein the scratches or score marks are on the bore of the valve housing rather than on the plug itself as in Fig. 2;

Fig. 5 is a view similar to Fig. 4 showing a modification wherein a generally cylindrical plug provides a line contact with a tapering wall of the valve bore and the turbulence producing score to the valve plug;

.Fig. 8 is a view similar to Fig. 7 but showing a modification wherein a generally cylindrical plug seals in a tapering bore and the turbulence producing rough surface is on the valve bore itv self;

Fig. 9 is a view similar to Fig. 2 but showing a ""modification wherein the roughening at the up- I per portion of the valve plug is provided by means of a spiral groove;

. features will be set forth in the appended claims.

Fig. 10 is a view similar to Fig. 9 but showing a modification wherein the spiral turbulence producing groove is in the valve body itself rather than in the valve plug; while Fig. 11 is a view similar to Fig. 10 showing a modification wherein a generally cylindrical valve plug seats in a tapering bore and the turbulence producing roughening of the valve bore comprises a spiral groove.

My invention is applicable to valves of various types but I have chosen to show the same as applied to a faucet of well known character and particularly to a faucet embodying my invention set -forth in my copending application, Serial No. 71,092 filed January 15, 1949, to which reference may be had for a more complete description.

The valve housing [0 is provided with a fluid inlet H and a fluid' outlet 12. Intermediate the inlet and outlet,- there is provided a generally cylindrical bore l3. A resilient plug of rubberlike material I4 is mounted on a stem portion !5 for movement in and out of the bore l3. The plug 14 has an uppermost diameter which is equal to or slightly less than the diameter of the bore l3. The plug then flares downwardly and outwardly in truncated cone form and has a base diameter at the bottom which is preferably slightly larger than the diameter of the bore I3. With this construction of the plug II, it may be compressed sufficiently to pass downwardly through the bore [3 when the valve is being assembled. To this end, the upper end of the bore is flared as indicated at 13a to cam the sides of the plug inwardly as it is passed downwardly to operative position. The lower end of the bore is flared outwardly at 13b to provide a good sealing action at the shoulder 130 when the plug is pulled up into sealing position as indicated in Fig. 2. This gives an annular line contact for sealing which closes the valve with a feather touch in a dripproof manner, which reduces the wear on the valve very greatly, and which affords a good closing action whether the controlled fluid is clean or dirty. There is a wiping action of the plug as it moves into sealing position which wipes away any dirt and produces a clean seal.

The stem portion I5 is mounted in the main stem Hi to move axially therewith but to rotate relatively thereto about the central pivotal axis.

The details of this mounting are shown in my above mentioned copending application. The usual threads I! provide cooperation between the stem and the valve housing to cause axial movement of the valve stem when the stem is rotated.

The upper end ofthe stem is sealed in the usual manner by packing l8. At the top of the stem a only be provided in that zone where the upper handle I9 is mounted for rotating the stem. edge of the plug 26 first approaches the tapering Downward movement of the stem is limited by wall 21. the boss I941 on the handle striking the packing In Fig. 6, I have shown a modification which is nut 20. Upward movement of the valve stem is in all respects similar to Fig. 2 except that the limited by the larger diameter of stem 16 abutturbulence producing construction in this case ting the lower face of the paclsing I 8 H consists in a itting 29 which is reduced around AS th? W fi m fi' h i fl-pbs fi'th'i upbetoir side wallof'ther' ilien't t'alve plug tion erl igite the closed position' or Fig. zjthere $0. The drawin" is nbia'd'e' temdidate ifmu he occurs 8 P d illustrated in 3 when h 10 ing of the rubber in this zone by sanding, abravalve plug is nearly closed. At this time, the Sign 01' any ther suitable process, fluid rushes with great velocity through v i'llle al1- gig. 'l isguite analogous to Fig. 4. Here a trussml r Space 2| between the pp r ed e ofthe plu to-conical resilient valve plug 3| fits into the genll and the bore l3 of the valve housing ijliirog fjelallycylindrica bore 32. The lower end of the to prevent singing and chattering ofthe valve "'bof ls 's iiowir', lightly rounded at 32a and proat this time, I rely upon two details of construcvid d witha'i dun m 33 whi h will give a turtion. In the first p nelqwe iendn s em bulence ,twthei i mi flow as the valve plug apl5 is flared ou w y. as Shown at S0 ,Eh proaches its sealed position. While the drawing its outermost a e app the Periphelal he's-"been dotted to indicate a roughening ot the diameter Of the D of P y above go order of sand blasting, it will be recognized by rtione'd c p 'ridin's' appl cation" explains whatthes tribse'slzillea in'triis artthat'theconstructiofi here "dimensidns'siioilld be." I also'nnd that it is d shown might be provided by a sand castingha'vfl la l b c a'turbiilenceof 'the'fluid'flow mg the"rounded"surtaceat 32a which is'iett" in throu t spa e T thisend; in thtflorm onginaruiinnished' form. Thisivllilvemfiioimy'devlc'e shown in'FigS 1,"2an I v P -=35 ficient roughness to provide the turbulencedevideda' very large number ot'flne scratchesfscore sired, "mar o v y's htgrooveszz entirely arou d 'FigfB is 'a'iiiodiflcation' of Fig. 7 in'whicl'i the "tlretupperpenphery' or the plug" It on'the t r resilient sealing plil'g'u is or generally cylindrical wall thereof and xt nd g y in direction form and seals in the tapered portion ofthe bore 'n-bm"to 'to"bottom or" generally'parallel" to the-' indicated at 35. The taper here is similar to that "aicis oi'thep lug" l4 andstem' l5. While" these previously jdscribedat2lin'Fig. 5. fH er'e' the marks or scratches edulli' 'e'xtend" 'fai'ther ""roughening 36"" l e natu ofsa a the plugQI find that they need'only' be' 'proprovided along "a "zonehearfthe' bottom: or the v'idedar'oundthe unt ge-thereoi, whi h s en im s io 89m tn 'rou e tnepertionvv'liien comes closefl to the shouldef'ufm e r f p F g; 5. .rm a aingivesga mr- I a "bulence'in the zone where the upper edge of plug I30 as,the valve plug movesclose to aclosed po r r I wotdsrthesel score marks are 34 first approachesthe tape! in a sealing acfihm 9@ 4! thiihigfligfifln "P'igs.""2and'6'." Here a resnientpliig'a1 of misto- 05 353393351g efl $gg- 3 conical shape seals in a bore 3! in the'valv'e hims- 'no; r o,, waisted mm. .m t ed es e m. m r 3 "tfififcfilfiii fittitlfiwtlfi .or t y scratches or groWeS are the "amine tore attlie'zorie 4o. "Iherouglietflri'g or "flaring wall. of the valve bore. which takes mvthisefiaseipmwdedfor lmrbmqnwb the blace of'ttie flaring wall I3b ofthefirst deiect, consists qt awspiral gllooveeuwmrmgql m .These scratches or grooves 25: "the'r'ubber-liliematerial of plug 31 'inthe" duter time tif lrfiifi. vei eeeeed" e r.int-en es. rm 335235523 ififsisit 2?-ihfemier gggg gggqggeggvgg geggggg gggg gggi lgg J'cone wall 24: obviouslm e e e er he ""depth." 1' naveqii lsti eteq agroove'extendlns 25 are" inthe'zoneiyvhere' the h Y P ll fluld about one turn of IiGOf ardfnnd topjo i ping 31. "flow itlllcgcu j st a: the valvem glrulggS lgr ggizghgg Tlhissp'rovldes turbulence asthe upraer edge of open Th w Score 'S'p iig" "ap' roae'hes='the*seaiin zone will provide the Jturbulent'flow ina manner simishwnagnomflcaubfimg that pmviFled by e e marks 0r s vvheyeme prain rrustp-eonieel-slug or resilient 22 on the valve plug in the form shown t e q n-sg'ls m't qfthe n 02. sho n the mine on velve lieusmgthe'seeling ocean-lug imne nat re v W11 11 O rim 'sor a" ilcCffi ctatthe'zione QJ'Hre'theibiiflhwherem'the r li nt valve plug 26 is ot g'encral y fimg SflfliCfiirft i causing tutb'olenee "cyl ndrical form and seals agamstthegrad l y a spiral groove or thread 35 out in thefla' 'ing gf a a d s g wsu as attire bottom" r'tlie ve ve :bore." For 7 per ex en rou y a n g 10 "eieame'ss, I avesnow'n'the "ends dr'thesmgle toiouegrees tothe vertical. t results from' th'i when efspirai'g-moveet 15a and ut'ann rlitve c nstruction that thle upp di g' g i indicated indot-dash lines at 'u' 'the positien' or "'08! P1118 P 'Q C 1116 con ac W en 1'5 "the intermediate portion oftlie spiral' 'g roov'e on "g'agestle tapering m: lt'il qizlliievalv boge. Bare n geg 'gig'e fleringwailfllt," whiehhtchld the t' 'ulenceis p v e a e zone W ere e not propei'ly a ar'in this diawing" as it 'o'c- Tlresef score marksgmighti extend entirely. al n W *eraily' cylindrical charactef seams against The taper of this wall is similar to that previously described at 21 and 35 in connection with other forms. Here the turbulence is produced by a helical groove 49 which is cut into the lower end of the flaring wall 48. The showing of this roove is similar to that described in more detail in connection with the groove 45 of Fig. 10. It will be obvious that this slight groove 49 occurs in that zone where the upper edge of plug 41 first approaches the tapering wall 48 for a sealing action. Thus turbulence occurs in the flow of the fluid in this zone as the valve approaches its closed position.

It will be noticed, in each case, that the actual line of sealing contact between plug and bore is between unroughened surfaces. The roughened surface is so placed on one part or the other as to be adjacent the narrow, annular opening (like 2|) just before sealing takes place.

What I claim is:

1. A valve comprising a housing having a fluid inlet and a fluid outlet and a connecting passage there between, said passage having a cylindrical bore near its upstream end, a compressible resilient frusto-conical plug partially and wholly insertable in said bore, said plug having its base of smaller diameter downstream and slightly less in diameter than said bore, said plug having its base of larger diameter upstream and slightly greater in diameter than said :bore, said plug forming an initial line contact at the zone Where said plug first engages said bore, and a roughened surface on the side wall of said plug near said base of smaller diameter, said roughened surface being entirely downstream from said zone.

2. The combination of claim 1 wherein said roughened surface comprises fine score marksv HENRY J. RAND.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 591,072 Bourne Oct. 5, 1897 1,415,407 Schweinert May 9, 1922 1,902,577 Oakley Mar. 21, 1933 2,148,850 Deakins Feb. 28, 1939 2,204,191 Sloan June 11, 1940 2,209,709 Weatherhead July 30, 1940 2,240,129 Brodecker Apr. 29, 1941 2,299,068 Gora Oct. 20, 1942 2,300,030 Zinkil Oct. 27, 1942 2,303,176 Sloan Nov. 24, 1942 2,341,394 Sloan Feb. 8, 1944 

